import Vue from 'vue'
import Vuex from 'vuex'
import {getRequest} from '../utils/api'
import SockJS from 'sockjs-client'
import Stomp from 'stompjs'
import {Notification} from "element-ui";

Vue.use(Vuex)
const now = new Date();

const store = new Vuex.Store({
  state: {
    routes:[],
    sessions: {},
    admins: [], //获取其他用户数据
    currentAdmin: JSON.parse(window.sessionStorage.getItem('user')),
    currentSession: null,
    filterKey:'',
    stomp:null,
    isDot:{}
  },
  mutations: {
    initRoutes(state,data){
      state.routes =data;
    },
    INIT_ADMIN(state,admin){
      state.currentAdmin = admin;
    },
    changeCurrentSession (state,currentSession) {
      state.currentSession = currentSession;
      Vue.set(state.isDot,state.currentAdmin.username + '#' + state.currentSession.username,false);
    },
    addMessage (state,msg) {
      let mss = state.sessions[state.currentAdmin.username + '#' + msg.to];
      if(!mss){
        // state.sessions[state.currentAdmin.username + '#' + msg.to] = [];
        // 接收到消息时更新界面
        Vue.set(state.sessions,state.currentAdmin.username + '#' +msg.to,[]);
      }
      state.sessions[state.currentAdmin.username + '#' + msg.to]
        .push({
          content:msg.content,
          date: new Date(),
          self: !msg.notSelf
        })
    },
    INIT_DATA (state) {
      // 浏览器本地的历史聊天记录
      let data = localStorage.getItem('vue-chat-session');
      if (data) {
        state.sessions = JSON.parse(data);
      }
    },
    INIT_ADMINS(state, data){
      state.admins = data;
    }
  },
  actions: {
    connect(context){
      context.state.stomp=Stomp.over(new SockJS('/ws/ep'));
      let token = window.sessionStorage.getItem('tokenStr');
      context.state.stomp.connect({'Auth-Token':token},success=>{
        context.state.stomp.subscribe('/user/queue/chat',msg=>{
          let receiveMsg = JSON.parse(msg.body);
          if(!context.state.currentSession || receiveMsg.from !== context.state.currentSession.username){
            Notification.info({
              title: '[' + receiveMsg.formNickName + ']发来一条消息',
              message: receiveMsg.content.length > 10 ? receiveMsg.content.substr(0,10) : receiveMsg.content,
            });
            Vue.set(context.state.isDot,context.state.currentAdmin.username + '#' + receiveMsg.from,true);
          }
          receiveMsg.notSelf = true;
          receiveMsg.to = receiveMsg.from;
          context.commit('addMessage',receiveMsg);
        })
      },error=>{

      })
    },
    initData (context) {
      context.commit('INIT_DATA');
      getRequest('/chat/admin').then(resp=>{
        if(resp){
          context.commit('INIT_ADMINS', resp)
        }
      })
    }
  },
})


// 监听session发生变化后将聊天记录存到localStorage
store.watch(function (state) {
  return state.sessions
},function (val) {
  console.log('CHANGE: ', val);
  localStorage.setItem('vue-chat-session', JSON.stringify(val));
},{
  deep:true/*这个貌似是开启watch监测的判断,官方说明也比较模糊*/
});


export default store;
